When Lizzie and Miranda are talking on the Internet, they tell each other about Kate, Lizzie says she stuffs her bra. However, she sends the message to the entire class roster accidentaly. When Kate finds out the next day, Miranda takes the blame for Lizzie. Meanwhile, Matt brings home a lizard from school for a class project and names it after Lizzie.
Lizzie's mom makes Lizzie wear a unicorn sweater to school picture day, that Lizzie does not like. Gordo wants to do a tough pose for his picture. Miranda wears the same outfit as Kate to get pictures. Matt has an unstudied test so he decides to fake sick.
Lizzie is happy to be on her way to a school camping trip, but is unhappy when finds out Jo, her Mom is a chaperone. Will her mom embarass him to death?
With Jo gone, Sam and Matt are left home alone.
When Lizze is not aloud to go to a Pool Party thrown by Danny Kessler, due to Grandma McGuire's birthday, Miranda becomes friends with Kate.
In an effort to prove she is really good at something, Lizzie trains for rhythmic gymnastics.
Convinced that Mr. Pettus is unwilling to give him a fair grade, Gordo switches science projects with Lizzie.
Aaron Carter is in town shooting a music video. Miranda, Gordo, and Lizzie sneak past gaurds to meet Aaron Carter. Unfortantly, they did not know Lizzie's Dad had bought them passes to get to the shoot with no trouble.
Lizzie tries to prove to her parents that she is responsible enough to babysit Matt.
When students have to choose between Larry Tudgeman and Claire Miller for class president, Lizzie decides to run for office. Although, she finds that gaining the favor of all her classmates won't be easy.
Matt gets an imaginary friend.
Lizzie's social studies class is paired off for a class assignment, where they have to pretend to be married and return for a school reunion. Lizzie, a little put out that Miranda got Ethan instead of her, neglects Gordo as her husband.
Troublemaker Angel gets Lizzie sent to detention, a place Lizzie had never visited before. She finds the experience to be almost fun, and starts hanging out with Angel on a regular basis. Gordo and Miranda have to step in to save Lizzie from becoming a "bad girl".
Matt makes a deal with Jo to eliminate his bedtime.
Lizzie and Miranda try to find their chance to go shopping for a bra without the interference of Jo.
Gordo gains a new interest: 1950's and 60's culture and music, reminiscent of the "Rat Pack". When Lizzie and Miranda cause the fad to catch on to everyone else in the school, Gordo decides he doesn't like the style anymore.
When Lizzie gets the assignment of writing a review on the school's play, she ends up saying that the show's star, Miranda, is a bad actress.
Lizzie's plans of spending time with Ethan are crushed with the sudden appearance of Matt at her school.
Gordo is intent on winning the Science Olympics at all costs against defending champion Larry Tudgeman. Matt becomes hall monitor at his school and gets carried away with his own power. Meanwhile, after she and Miranda work on a successful volunteer project at school, Lizzie becomes an environmental warrior, a fanatic for collecting clothing and food for the homeless, and even a vegetarian!
When Matt's magic tricks go a little too far, he ends up handcuffed to Lizzie. Sam and Jo decide to leave them stuck together for a while to teach them tolerance.
Lizzie's heimlich maneuver training comes in handy when she must save a choking man at the movie theater. Only problem: she, Lizzie, and Miranda were only at the theater to sneak into an R-rated movie.
Gordo lies to Lizzie and Miranda about a girl that he is dating. To "protect" him, Miranda dressed up as a boy and goes on a "date" with Lizzie to spy.
Gordo tries to tutor Ethan in math to earn money for a new stereo. But when Lizzie seems to have an easier time getting Ethan to understand the material, Gordo gets jealous.
Lizzie tries to bail on "Father-Daughter" plans to spend time with Ethan.
When Gordo is selected as the subject of a reality video, he is willing to compromise friendships to please the director.
When Lizzie becomes a teen model, her friends start treating her completely different. In an effort to make things normal again, Lizzie treats Gordo and Miranda like flunkies to make them see the error of their ways. They then develope a plan to get Lizzie out of her contract with the modeling company.
Lizzie, Miranda, and Gordo compete in a Fact-atholan to win a trip to Miami.
When Lizzie discovers that Larry Tudgman has a crush on her, she can't make herself say no when he asks her out. She has a surpisingly good time on their date, but is appalled when Kate announces that Larry and Lizzie are a couple.
When Lizzie is absent from school, partners are picked for projects. After school Miranda and Gordo share Lizzie some bad news, she was not he only person home today. Kate happend to be absent also so tomorrow she will be paired with Kate for a project.
The next day Kate comes over to create their food project for social studies. While they work, they begin to rember back when they where friends. They begin to warm-up to each other.
Miranda becomes tounge-tied around a boy she likes.
Accident-prone Lizzie McGuire gets the adventure of a lifetime when she takes a two-week school trip to Rome following her junior high school graduation. On her first day in the Eternal City, Lizzie meets Paolo, half of a famous Italian pop duo. Paolo and his partner, Isabella, have recently split up due to creative differences. With the exception of her blonde tresses, all-American Lizzie is a dead ringer for the dark-haired Isabella, and charming Paolo persuades her to pretend she's Isabella at an important awards show. Posing as the diva, Lizzie is waited on hand and foot and admired by millions--and she gets to hang out with a cute Italian boy who seems to like her. Of course, sneaking away from her school tour is no easy feat, especially with group leader Miss Ungermeyer on watch. But with the help of her lifelong pal, Gordo , who also harbors a secret crush on his best friend, Lizzie gets to live out her fantasies.
Lizzie gets her first kiss.
When the class has to do a culture assignment, Lizzie, Miranda, and Gordo go on a apanish gameshow in which becomes more difficult when the only spanish-speakker on there team is not allowed to play.
Lizzie gets her first job working at the digital beam. But it the jobs turns out to be less fun then she expected.
Lizzie and Matt switch bodies.
Lizzie wants to win best dressed, but wants to buy really expensive clothes, so her mom goes bargain hunting for clothes instead.
The end of the school year comes to a close. Lizzie and Gordo rember all the good times at Hillridge. Lizzie and Gordo write in each others yearbooks but Gordo does not know what to write.
Lizzie and Miranda see a show they liked when they were younger. They decied to go to a taping.They look for someone younger to go eith them so they won't be alone at a kiddy show. Matt turns them down due to his "Dirt, Stains, and Grime" mueseum.
After being turned down a few times, they decide to alone anways. When they arrive, Lizzie is spotted by Kate, who the next day tells everyone about the taping.